We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.
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Thomas Jefferson (plato.standford.edu)Scholars in general have not taken seriously Thomas Jefferson (1743–1826) as a philosopher, perhaps because he never wrote a formal philosophical treatise. Yet Jefferson was a prodigious writer, and his writings were suffuse with philosophical content. Well-acquainted with the philosophical literature of his day and of antiquity, he left behind a rich philosophical legacy in his declarations, presidential messages and addresses, public papers, numerous bills, letters to philosophically minded correspondents, and his only book, Notes on the State of Virginia.
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Portrait_of_Sir_Isaac_Newton,_1689.jpg
Isaac Newton (Wikipedia)Sir Isaac Newton PRS (25 December 1642 – 20 March 1726/27) was an English mathematician, physicist, astronomer, alchemist, theologian, and author (described in his time as a “natural philosopher”), widely recognised as one of the greatest mathematicians and physicists and among the most influential scientists of all time. He was a key figure in the philosophical revolution known as the Enlightenment. His book Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687, established classical mechanics. Newton also made seminal contributions to optics, and shares credit with German mathematician Gottfried Wilhelm Leibniz for developing infinitesimal calculus.